Kermit first gained a collar in June 1962.[1] He wore a minstrel collar in 1962's Tales of the Tinkerdee, though this was orange and cropped with square-points, different from green triangular-pointed collars he would later wear.

“Kermit’s collar for the Tales of The Tinkerdee pilot in 1962 was crenulated [sic]. The triangular points came later in the decade – in the late ‘60s, he wore a single collar with thirteen points, and in the first seasons of Sesame Street, he wore a double collar. Throughout the early 70s, adjustments were made to the collar, but since the first episode of The Muppet Show in 1976, Kermit’s look, with a single eleven-point collar, has remained virtually unchanged."[2]”

Kermit sported a double collar for a brief period in the early 1970s, including in the TV special The Frog Prince and several early seasons of Sesame Street, but by the time he took over as the host of The Muppet Show, it changed to the trademark single collar with eleven points that he still wears today.

In a 2015 tweet, Kermit wrote: "Rowlf is one of my great friends. Not only does he run the best tavern in town, but we like to bond over the fact that we both wear collars!"[3]

The image of Kermit's iconic collar was used for the cover of The Muppet Show: Season One DVD set and was incorporated into the Muppet franchise's logo in 2010 with the "M" in Muppet dressed with a similar collar and felt texturing. Kermit hung a stocking with a similar collar in the "I Believe" music video. Several Muppet t-shirts have also been produced with a Kermit-inspired collar print.